Shaped by the currents and curves of the Wisconsin River, Wisconsin Dells has been a favorite family vacation destination for more than 150 years. An explosion of indoor water parks has turned the Dells from a summer hot spot to a year-round destination. Kids will enjoy the seemingly endless supply of fun and games, from go-karts to miniature golf, sideshows to thrill rides. If the weather's right, you can take a Duck tour of land and water, and top it all off with a heaping helping of the local fudge.

Mayan ruins tower over the sea in Tulum. The formerly walled city was one of the last to be built by the Mayans, and its archaeological sites are incredibly well preserved. Take a break from the beach to visit El Castillo, the Temple of the Frescoes, and the Temple of the Descending God. Explore an underground river under a canopy of stalactites in the sacred caverns of LabnaHa Eco Park, or dive into Cenote Dos Ojos to snorkel inside of caves in the middle of a forest.

Plan to cross many bridges when in Cork. Ireland's third-largest city began life as an island and now spans both banks of the River Lee, with watery channels running beneath some of its main thoroughfares. The best way to experience this hilly southern seaport is on foot, following the signposted walking tour past St. Finn Barre's Cathedral and the riverside quadrangle of University College up the hill to red and white Shandon Church. Along the way, you'll meet plenty of the city's talkative residents.

Reigned over by a 12th-century castle, the seaside town of Scarborough centers around a pretty, horseshoe-shaped bay lapped by the North Sea. Sandy beaches, surfing opportunities, and hearty Yorkshire fare have made Scarborough a family favorite for more than 400 years.